New water-insoluble styryl dyestuffs



United States atent Patented Sept. 2, 1958 tie NEW WATER-HQSOLUBLE STYRYL DYESTUFF No Drawing. Application July 12, 1957 Serial No. 671,420

Claims priority, application Switzerland July 18, 1956 7 Claims. 01. 260-465) The present invention relates to new water-insoluble styryl dyestufis which correspond to the formula wherein A represents the cyano radical, or a carbalkoxy radical, or a benzene-, diphenyl-, naphthalenemonoor -disulfonyl radical which may be substituted by halogen atoms or alkyl groups containing less than 6 carbon atoms, or a 1,3,3-trimethylindolium radical combined in the 2 position and further substituted if desired, x hydrogen, a methyl, ethyl, methoxy or ethoxy radical, y hydrogen, a methyl, ethyl, methoxy or ethoxy radical or, when A stands for a 1,3,3-trimethylindolium radical, also halogen or the trifiuoromethyl radical, R; an alkylene radical with 1 to 4 carbon atoms, R an alkylene radical with 2 to 4 carbon atoms, R; an aliphatic, cycloaliphatic or aromatic radical which is free from water-solubilizing groups and may be further substituted, one V oxygen and the other V the imino group, M hydrogen, a low molecular alkyl or alkoXy radical or, when A stands for a 1,3,3-trimethylindolium radical, the cyanomethyl, difluoromethyl or trifiuoromethyl radical, a carbalkoxy radical, or the R -V--CO--V radical in which R and V possess the aforenamed meanings, T hydrogen, when A stands for a 1,3,3-indolium radical, and the cyano radical, when A has another meaning, and n the number 1 or 2.

Especially interesting dyestuifs are those which correspond to the formula Ra-V- MI-CHz-CH:

wherein each of x, w and t represents hydrogen or methyl, y represents hydrogen, chlorine, bromine, methyl or trifiuorornethyl, M represents cyano, difluoromethyl or trifluoromethyl, and v represents hydrogen, chlorine or nitro.

The process for the production of the new water-insoluble styryl dyestuffs consists in condensing 1 or 2 moles respectively of an aldehyde free from Water-solubilizing groups and having the formula wherein x, y, R R V and M possess the meanings previously recited, with 1 mol of malonic acid dinitrile or of a cyanoacetic acid alkyl ester or a benzenesulfonyl or diphenylsulfonyl acetonitrile or a naphthalenemonosulfonyl or naphthalenedisulfonyl acetonitrile, which may be further substituted by halogen atoms or alkyl groups having less than 6 carbon atoms, or a 1,3,3-trimethyl-2- methyleneindoline which may contain further substituents.

Examples of cyanoacetic acid alkyl esters conforming to the present definition are the methyl, ethyl, propyl, isopropyl, butyl, isobutyl, tert.butyl, -2-methoxyethyl, -2- ethoxyethyl, -3-methoxypropyl, -3-ethoxypropyl, -3-methoxybutyl, and -3-ethoxybutyl esters. Suitable compounds containing the acetonitrile radical are phenylsulfonylacetonitrile, chloro-, dichloro, methyl-, ethyl-, isopropy1-, tert.butyland dimethylphenylsulfonylacetonitrile, naphthyl-, isopropylnaphthyland diphenyldisulfonylacetonitrile. Among the 1,3,3-trimethyl-2-rnethyleneindolines, the l,3,3-trimethyl-2-methyleneindoline itself, the l,3,3-trimethyl-2-methylene-S-chloroindoline and the l,3,3-trimethyl-2-methylene-5-nitroindoline merit special mention.

The reaction of the aldehyde with the active methylene compound is performed advantageously by causing the aldehyde to act upon the said compound at fairly high temperature in homogeneous solution in an organic solvent and in presence of a small quantity of a basic substance, e. g. ammonia, dimethylamine, diethylamine, piperidine, sodium alcoholate or potassium alcoholate.

It is also possible to heat a mixture of the above-mentioned reactants in presence of glacial acetic acid or another organic acid plus a proton acceptor such as ammonia, diethylarnine, dimethylamine or piperidine and, if desired, a solvent like benzene, toluene, xylene, chloroform or carbontetrachloride, acting as a recycling agent. The water of reaction is continuously drained off so that there is a constant shift in the equilibrium position to the side of the condensation product.

Condensation can also be conducted by saturating a homogeneous solution of the two reactants in a suitable solvent with dry hydrogen chloride. This procedure gives rise to a hydrogen chloride addition product, which upon distilling or heating with tertiary bases such as dimethylaniline or diethylaniline splits olf the hydrogen chloride to yield the desired ethylidene compound.

Finally, condensation can be carried out by melting together the reactants and a basic catalyst such as am- (III) V 2,850,520 I n p V monia, dimethylamine, diethylamine, piperidine, ammonium acetate or piperidine acetate in the absence of solvent.

The dyestuffs are isolated by one of' the 'common basic operations, e. g. filtration, evaporation of the solvent, or

precipitation from the solvent with a suitable precipitating agent. 7

The new dyestuffs are soluble with fiber-forming polyme'rs in organic solvents. The resulting solutions can be spun by the established methods, both wet and dry. As compared with the mass coloration of fibers'with pig- .ments, the new styryl dyestuffs present an advantage in that they do not cause clogging in the extruder or incrustation of the filters.

By virtue of their solubility inorganic solvents the new styryl dyestuffs are also suitable for the masspigmentation of oils, lacquer media and synthetic resins. A certain number "of'them, notably. those, containing a sulfonyl group, have been unexpectedly found to be applicable in the synthetic polymer melt prior to extrusion, a dyeing process employed in the manufacture of the synthetic polyamide and polyester fibers. I

In this connectionit is worth noting that almost all of the azo dyestuffs are destroyed under the temperature conditions obtaining in this process.

Many of the new styryl dyestufls, especially those which do not contain a sulfonyl group, can be dyed from suspension, preferably at high temperature and in the presence of agents with dispersing action. They draw on synthetic polyamide fibers, e. g. nylon and Perlon (registered trademark); cellulose ester fibers, e. g. secondary cellulose acetate and cellulose triacetates; polyvinyl fibers; polyacrylonitrile fibers, e. g. Orlon (registered trademark); and terephthalic acid ester fibers, e. g. Terylene, Dacron (registered trademarks). The dyeings are greenish yellow to red in shade. Special mention is due in this connection to the outstanding affinity for Orlon of those styryl dyestuifs which are obtainable from an aldehyde of Formula IV anda 1,3,3-trimeth yl- Z-methyleneindoline free from water-solubilizing groups but containing further substituents if desired. A' number of the dyestuffs also dye wool and silk.

Applied to the. above-named fibers from'suspension,

the dyestuffs give dyeings of very good fastness to Water, washing, perspiration, sublimation, ironing, heat setting and gas fumes.- The light fastness of the. dyeings on polyamide fibers is good, and on the other fibers very good to outstanding.

Dyeings produced in the spinning solution or the molten mass possess good to very good fastness to light,

A dyebath is prepared with 0.6 of the dyestufl obtained as described above and dispersed with Turkey dyeing process is completed. The fabric is removed,

rinsed and dried.

To improve its dispersibility the dyestuff can be ground prior to dyeing with suitable wetting, dispersing or emulsifying agents, preferably in the presence of inorganic salts such as Glauberis salt. It can also be intimately water, washing, perspiration, cross dyeing, chlorination in alkaline medium, sublimation, oxalic acid, dry clean- EXAMPLE 1 32.6 parts of l-[N-ethyI-N-(Zf-phenyIcarbamic acid ethyl ester)l-amino-3-methyl-4-benzaldehyde together with 10 parts of 'cyanoacetic acid methyl ester and l part of piperidine in 30 parts of methyl alcohol are heated to the boil with reflux; i

. After some time the deep yellow-colored mass is cooled V to 0, upon which the new styryldyestufi crystallizes out in beautiful yellow needles. It is filtered off, washed with l l o and ied. .I i r adi y bl In ethyl tate and acetone and melts at 122. It dyes secondary cellulose acetate and cellulose triacetate, terephthalic acid ester fibers, polyamide and polyacrylonitrile fibers e in brilliant greenish yellow shades of excellent fastness to Water and seawater. The dyeings also possess high fastness to light, sublimation, gas fumes, washing, per spiration, ironing, and heat setting.

parts of 1- [N,N-di-(2'-phenylcarbamic acid ethyl ester)]- amino-3-methyl-4-benzaldehyde. and, 50 parts of glacial, acetic acid are heated with reflux. The solution soon turns mixed with a dispersing agent to give an aqueous paste,

which is converted into 'a dyestutf powder by suitable drying. g

When an equal quantity of the same aldehyde is condensed in an analogous manner with 8 parts of malonic acid dinitrile, a yellow dyestuif is obtained whose melting point is 125. V r I 7 i The above-mentioned l-[N-ethyl-N-(Z'-phenylcarbamic acid ethyl ester)l-amino-3-methyl-4-benzaldehyde is new 7 and is prepared as follows:

44 parts of N,N-dimethylformamide, 120 parts of phosphorus oxychloride and 729.8 parts of 1-[N-ethyl-N-(2'- phenylcarbamic acid ethyl ester)l-amino-3-inethylbenzene are heated to and this temperature held for some,

time. As soon as the reaction is completed, the reaction mass is poured into a mixture of 300 parts of ice and 300 parts of water with thorough stirring. The resultant I suspension iseadjusted to pH .6 .by the addition of a 5% solution of sodiumhydroxide. After some time the precipitated product is separated and dried in vacuo. his a light colored oil which congeals after some time and melts at 88-89.

EXAMPLE 2 As soon as the reaction is completed the reaction mass 7 is allowed to cool and then pulverized. The new styryl dyestuff thus .formedgcan be ref-crystallized from methyl alcohol, its melting point then being 145?. Its acetonesolubility is higher than grams per liter. Applied in cellulose acetate and triacetate spinning solutions, the dyestuif yields brilliant greenish yellow shades which possess very good fastness properties.

' 100 parts of cellulose acetate are mixed for a short time with 300 parts of a solvent (93 percent acetone plus 7 percent methanol), and the mixture left overnight to swell.

ample isdissolved in 60 parts of the solvent by simple shaking, the solution being added to the cellulose acetate spinning solution. The mixture is stirred in an open mixing vessel until 60 parts of the solvent have evap V orated.

The dyed mass is pumped into the spinning pot and spun in the normal way. The dyed filament is greenish yellow in shade and exhibits excellent fastness to light,

washing, cross dyeing, chlorine in alkaline medium, oxalic acid, peroxide, bleaching, gas fumes, rubbing and hydro- V sulfite. 7

EXAMPLE 3 .18 parts of 1,3,3-trirnethyl-2-methyleneindoline and'43 dark red in color, After some time the mass is discharged into ice water with constant stirring, and then 0.5 part of the dyestufi' obtained according to this ex precipitated with common salt. A good yield of the produced by one of the processes described in the above, hydrochloride of the base is obtained. The dried styryl and correspond to the general formula dyestufl? dissolves well in acetone and melts at 90. It Bream is applied to cellulose acetate and triacetate spinning T 1 solutions to give very brilliant red shades. On Orion 5 /I\GCHCH A it is dyed from aqueous suspension in brilliant red shades. I J

The dyestufi has very good fastness properties on these 2/ n (v) fibers. The meanings of B B A, y and n are given in the col- When the 43 parts of 1-[N,N-di-2'-phenylcarbamic umns so headed. A further column contains the melting acid ethyl ester)]-amino-3-methyl-4-benzaldehyde in Ex- 10 points of the dystufis, and in the final column the shade ample 3 is replaced by 32.6 parts of 1-[N-ethyl-N-(2'- produced in solution-dyed cellulose acetate is noted.

Table 1 Ex. B1 B: A y n M. P., Shade 1.11 cellulose No. degrees acetate 4---" Ethglcai'bamic acid Ethyl Oyano 1 122 Greenlsh yellow.

ra 1C8 V a do do Oarboxyinethyl 1 165 Do. 6 Phenylcarbamic acld Phenylcarbamic acid 4-metl1ylphenylsulfonyl 1 165 Do radical. ethyl radical. 7 do Methyl Oyano 1 142 Do. 1 136 Do. Carboxymethyl l 116 Do. 4'-methylphenylsulf0ny1 1 122 Do. Phenylsulfonylfl 1 142 Do 5,6,7,8-tetral1ydr0naphthyl-2- 1 146 Do sulfon 3,4-dichloropheny1su1fonvl 1 157 Do 0 ano 1 153 Do. 4 methylphenyl 1 107 D0. Carb0xymethy1 1 188 Do. Naphthyl-2-sulf0ny1 1 134 D0. 4-chlorophenyl-l-sulfonyL 1 126 Do. do..- 1,1'-diphenyl4,4-disulfonyl 2 150 Do. Carboxylic acid ethyl Oyano 1 123 Do. esterimide do do Oarboxymethyl 1 119 Do.

phenylcarbamic acid ethyl ester)]-ami'no-3-methyl-4- Table 2 contains further water-insoluble styryl dyebenzaldehyde or by 31 parts of l-[N-ethyl-N(2-phenyl- Stuffs Whlch correspond to the formula carbamic acid ethyl ester)l-amino-4-benzaldehyde or by I 44 parts of 1-[lLN-di-(2-phenylcarbarnic acid ethyl A ester)l-amino-4-benzaldehyde respectively, three styryl CH=C/ d estufis are obtained with the meltin oints 44 60 y g p M-CHz-CH: CN

and 101". These products have similar dyeing properties 49 y (VD to those described in the first paragraph of this example. Th are characterized by the symbols R w, M, y, x

In the following Table l descriptive data of further d A in columns (I) to (V1) and by the shade provaluable styryl dyestufis are presented. They can be duced in solution-dyed cellulose acetate in column (VII).

Table 2 Ex. (I) II) (IV) No. R; w M y z A Shade in cellulose acetate Hydrogen. Greenish ellow. Methyl D0. y Eth Do. do Do. Methyl... Do. Hydrogen- Do. Methyl.-. Do. do Do. do Do. Ethyl do Do. do Methoxy.- Do. Methoxy Ethy1 D0.

Ethoxy Ethoxy d Do. Hydrogen Methyl"- d a Do. do o a 4 Do. -.do... do. Do.

do do Do. 3-methylphenyl ld 1 do Do. 3,4-dimethylphenyl "do do Do.

41. Phenyl Methyl.-- ndo do Do. 42 r a do do do Do.

o do do do Do.

do do do Do.

do Do.

Ethyl---" Do.

d Hydrogen- 0arbomethoxy Do.

d Hydrogen. do Ethyl".-. dsppropylphenylsulfo- Do.

my a

Ethoxy 4-chlorophenylsulionyl Do.

Hydrogen do. do Hydrogen. Oarbo-isoamyloxy. Do.

57 do do do do do Carbo-(3-ethoxy)-butoxy. Do.

7 In Table 3 water-insoluble styryl dyestuffs a1 'e enmner-;- ated which correspond to the formula d 7 (VII) They are chructerized the sytnbols 147), y, M ,aud D in columns (I) to (IV) and by the shade produced in solution-dyedcelluloseacetate in column (V).-

They ai'e characterized lay the symbols R w; M, and A in columns (I) to (V1) and by the shade produced in solution-dyed cellulose acetate in column (VII).

Table M E (I) (n diff H (IV) sh i m x. c No. w 1 M 77 7 D- -ee1lu1ose 7 7 7 77 7 7 acetate 7 7 Hydrogen- 7 Greenish yellow.

Do. 4-isopropylphenyl Do. 7 4-tert;buty1pheny1 7 Do. 7 7

h 7 'Do. Naphthyl-2'-. 7 Do. 5,6,7,8'-tetrahydronaphthyl-Z. 7 Do. Phenyl 7 7 77 7 7 7 7 Do. 4-methylpheny1 D0. Phenyl 7 7 1 7 7 D0. 7 4-methylpheny1 Do. 4-chlorophenyl Do. Phen 7 Do. 4-methy1phenyl Do. Plum 1 Do. 4-methy1pl1eny1- Do. 3,4-dimethylphenyl Do. 4-tert. butylphenyl D0. Phenyl .Do. 4-methy1pheny1 D0. Pheny D0. 4-methylpheny1 D0. Phenyl Do. 4-methylpheny1 Do. do Do.

Phenyl Do. -.do Do. 5,6,7,8-tetrahydronapl1thyl-2- Do. do 4methylpheny1 D0. Methyl... dn do dn Do.

do do do Phenyl A 7 D9. 7 91--- Hydrogen. Methyl.-- Hydrogen. 1,l-diphenyl-4 D0.

7 Table 4 V 7 (I\Z) D i (VII) Shadeln ...y. 2:: A cellulose acetate 7 Hydrogen- Greenish yellow Do. Do. Do. Do. Do. 0 D0.

Carbomethoxy D0. Carbeth Do. Do. Do. Do.

. D0 3',4f dlmethylphenylsulfonyl D0. ethylphenylsulfouyl- Do. Do.

D0. 4-chlpr0phenylsulfonyl Do. Napbthyl-2,-sulfonyl.- Do. 5,6,7,8'-tetrahydrona ht Do.

fonyl. 4-me thy1phenyls1flionyl. D0. U 60-. Do. 114--- 3-methoxybutyldo D0. 115.-.. Ethoxyethyl- 7 Do.

Q The water-insoluble styryl dyestufis of Table corcolumns (I) to (IV) and by the shade produced in respond to the formula solution-dyed cellulose acetate in column (V).

CH: 1 HgC- M1 O-NH-COO-CHr-CE: l

/N CH=CH\\N/ M-CHr-CH:

and are characterized by the symbols M, y, x and M 1n columns (I) to (IV) and by the shade produced 111 Table 6 solution-dyed cellulose acetate m column (Y).

Table 5 (I) (m (In) (IV) (V) Ex. Shade in (I) (II) (III) (IV) (V) N0. w M a: A cellulose acetate Ex. Shade in No. M u 2 M1 cellulose V acetate 135.- Hydrogen. Hydrogen. Hydrogen- 1,1-dlphenylyl- Greenish 4,4 yellow 136.- Methyl do Do. Hydrogen. Re 137.-.--do Methyl... D0. (1 Ethyl-.. Do. do Do. Methyl... Do. Hydrogen. -Do.

Do. Do. Methoxy do-... Do. Methoxyu- -do Naphthylene- Do. Ethoxy--- 2.6. Oyano Methyl. Do. Difiuoro- Methoxyn. Do. methyl 0 Do. 'Irifluorodo Hydrogen. Do. methyl Hydrogen. o Do. Carbomethoxy. Phenyl- 0&1- bamld. EXAMPLE 151 131 Hydrogen. d 01: 1am--- go. iii-'- 1'32 l1 ogen' 31 ,12 'fi g 8: 200 parts of cellulose tr1acetate, 5 parts of the dyestufi H4 dn Methyl--. (in obtamed according to Example 10 which has the formula Os ON The water-insoluble styryl dyestuifs of Table 6 have 927 parts of methylene chloride and 49 parts of ethanol the formula are compounded to a homogeneous paste. This is pumped w w 60 into the spinning pot in the normal way and spun. The filament is dyed a bright greenish yellow which possesses excellent fastness properties. /N 0 =0 M-CHz-CH: O EXAMPLE 152 5 (X) A solution composed of 400 parts of polyethylene, 4 and are characterized by the symbols w, M, x and A in parts of the dyestufi of the formula OKs-C water as precipitating agent.

whichnisiobtained according to Example'11',;and'600:parts of xylene is extrudedthrough orificesof 0.5mm. diameter into mixtures of butyl alcohol and butylphthalate. The precipitated greenish yellow filament is washed in petroleum ether and dried in warm air.

EXAMPLE 153 1 part of the dyestufr of the formula ONE-O o-o-om-cn. r so N on=o obtained according to Example 12 and 150 parts of poly vinylchloride are dissolved in 849 parts of cyclohexanone' at 80?. The hot solution is then spun into a precipitation bath of 500 parts of cyclohexanone and 95 00 parts of 2-ethylhexanone'at 30; The greenish yellow filament;

is reeled, dried under tension and orientated. I j

EXAMPLE 154 t Zparts of the dyestuft of the formula CHa-Ca ON 7 I i N 3 L V .1. V

1 Part of the yesms 6f the farms;

w on,

CBS-C obtained according to Example 1 3, 280 parts of'postand 179 parts of polyacrylonitrile are dissolved'in 820';

chlorinated polyvinyl chloride and 10 parts. of diethyl sulfide are dissolved in 708 parts of acetone at The mass is pumped into the spinning pot and spun in the' normal way. The filament is precipitated by water, orientated and dried at 40 to 70. It is dyed in a greenish yellow shade.

7 EXAMPLE 155 A mixture of 1 part of the dyestufi of the formula obtained according to Example 15 and 199 parts of a copolymer composed of 60.1% of vinyl chloride and 39.9% of acrylonitrile are mixed with 800 parts of acetone for i hours at 'A homogeneous yellow'solution is; obtained, which is filtered and spun into filament, using The filament is orientated and heat-set in boiling water; It is dyed a greenish yellow shade with good fastness properties.

EXAMPLE 156' 165 parts of polyacrylonitrile and 1 part of the dyestufi 7 obtained according to Example 17 and having the formula parts .of diniethylformamide at The resultant past is pumped through the spinnerette' into a j precipitating bath of glycol at i. The filament is reeled, orientated, n

45 washed with water to remove the retained glycol, and

finally dried. Greenish yellow dyeings with good fastness properties are obtained.

- I EXAMPLE 158 V 25 parts of the dyestufi of the formula ONH-co-o-om-on,

with 5000 parts of Rilsan and themixture melted in a nitrogen atmosphere at -230: by' the normal method: The thick liquid mass is spun into greenish yellow filaments with good fastness properties.

13 14 EXAMPLE 159 25 parts of the dyestufi of the formula CH3 6 CH3 NHCO-O H-CEQ /S0a CH: N GH=O CHa-Cfig CN are mixed with 5000 parts of nylon (nylon 66) and the EXAMPLE 162 mixture melted by the normal method in a nitrogen atmosphere at about 285 Upon spinning, the thick liquid mass yields greenish yellow filaments with good fastness properties. The filament can be orientated and/or crimped and heat-set to render it shrinkproof.

EXAMPLE 160 25 parts of the dyestuif of the formula EXAMPLE 161 1 part of the dyestuff Gun-oo-o-om-om /ON N CH=C CHE-CHPCHPCHQ ON is mixed with 300 parts of polyethylene and spun by the normal extrusion method. Bright greenish yellow filaments or bristles are obtained. Polystyrene can be solution-dyed with this dyestuff on similar lines.

0.5 part of the dyestuff of the formula Anion N is added to 100 parts of cellulose acetate and the mixture spun according to the procedure given in Example 2. Bright red filaments of very good fastness are obtained. When the cyanoethyl group in this dyestufi is replaced by the trifluoroethyl group, the resultant dyestuif yields a rather more yellowish shade in cellulose acetate fibers, though the standard of fastness is the same. When in place of the unsubstituted aniline derivative the derivative which contains a methyl group in the m-position to the tertiary amino group is employed, the dyestuffs so obtained are a slightly more pronounced bluish red, both in substance, in solution, and in the fiber. Similar properties are possessed by the corresponding N-difiuoroethylarnino dyestufis and the dyestufis which in place of the phenylcarbamic acid ethyl radical carry the phenylcarbamic acid isopropyl radical. The latter-named dyestufis are also Well suited for the mass dyeing of cellulose acetate fibers in red shades.

Formulae of representative dyestufis of the foregoing examples are:

EXAMPLE 1 CHJi-Cfii ON and its variant of paragraph 3 Orrrr-oo-o-om-og:

EXAMPLE 2 CH=C CH3 NH-C o-o-oni-ogi 00-011, N- on=o CHr-CH:

EXAMPLE 3 EXAMPLE 11 OKs-C63 15 r i' 16,., EXAMPLE 12 ONE-GO-O-OEI -GH:

O w A V ore-om V, 7 ,7 W we EXAMPLE 22 which fig and -V possess the aforenamed meanings, T 7 represents hydrogen, when A stands for a 1,3,3-trimethyl V 7 CH; indolium radical, and the cyano radical, when A has O' T ZTCE gf another meaning, and n represents one of the integers; l p N .GH=C.\V 173M123: l f r p 7 b39 ON 2. A water-insoluble styryl'dyestuif which corresponds Having thus-disclosed the invention what is claimed to the formula V V a is: n 7 t 1. A Water-insoluble styryl dyestufi which corresponds O A CH! to the formula K O i I l n i ore-0H1 ON wherein w represents a member selected from the group TV a V 7 P'TYT a J 7 member selected from the group consisting of the cyano wherein Avrepresents a member selected from the group and the 1 Y P Y y i consisting of the cyano radical, a carbalkoxy radical The Watef-1I1$0111bl6"StYrY1 dyesmfi Wlllch Correcontaining less than 8 carbon"atoms,. an arylsulfonyl; sponds to the formula V t l i I radical containing less than 14 carbon atoms, an aryl- CH3 sulfonyl radical containing less than. 14 carbon atoms g gt OH=O consisting of hydrogen and-methyl, and A represents a;

radical, the phenylsulfonyl, the 4-m ethylphenylsulfonyl" and substituted by chlorine, the unsubstituted 1,3,3'-tri- N r v methylindoliumradical combinedin the 2-posit-ion, the CHrCg ,7

1,3,3 trimethyl-5-chloroindolium radical combined in the 2-position, and the 1,3,3-trimethyl-5-nitroindolirim radical 4. The water-insoluble styryl dyestuft which correcombined in the 2-position, 3c represents a member sesponds to the formula a CHsfrom the group consisting of hydrogen, methyl, rnethoxy,

' ethyl and ethoxy, and, when A stands for a 1,3,3-trilected from the group consisting of hydrogen, methyl, CH 1 I I V methoxy, ethyl and ethoXy, represents a member selected O r 3 V ON,

' N-QOHTx/ Y l methylindolium radical, also bromine, chlorine and tri- OHS-CH1 fluoromethyl, R represents an alkylene radical w ith l 40 5. The water-insoluble styryl dyestuff which correto 4 carbon atoms, R represents analkylene r'adical with sponds to the formula. t

I I GET-CH: e C N 2 2 to 4 carbon atoms, R represents "a member selected 6. The water-insoluble styryl dyestufi which correfrom the group consisting of a lower-aliphatic, a cyclosponds to the formula i e 7 a i H; O -Q*9T9 .{1 J r a,

.1 E 1'15 GHrCfifl ON a aliphatic, an unsubstituted and a methyl substituted 7. The,,water-insoluble styryl dyestuflf which corremononuclear aromatic radical'free from water-solubiliZ: ;hsponds to the formula i i i CH3 7 it, 7 rOnn-oo-o-cm-orn /SOr-O f iii. GEE-0H: 0

ing groups, one V represents an oxygen atom and the ReferencestCited in the file of this patent other V the imino group, M represents a member se- 8 lected from the group consisting lof hydrogen, lower 5 u UNITED STATES PATENTS lky w r alkoxy when A stands for a -t 2,22-6,054 Felix et a1. Dec. 24, 1940 methylindolium radical, also cyanomethylf difluoromethyl, tn'fluoromethyl, carbalkoxy' and R -V-CO-V in 2,583,551 Dickey et a1. Jan. 29, 1952 UNITED STA'IES PATENT OFFICE Certificate of Correction Patent No. 2,850,520 September 2, 1958 Ernest Merian et 31.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction and that the said Letters Patent should read as corrected below.

Column 1, lines 19 to 24:, formula (I), for that portion of the formula reading N-R, M-n

column 6, line 10, for dystufis read dyestufis-. Signed and sealed this 28th day of April 1959.

Attest= T. B. MORROW, ROBERT C. WATSON,

Attestz'ng Ofiaer. Gammissz'oner of Patents. 

1. A WATER-INSOULBLE STYRYL DYESTUFF WHICH CORRESPONDS TO THE FORMULA 